Results 231 to 240 of about 23,991 (260)

Effects of canopy shade on the lipid composition of soybean leaves

Physiologia Plantarum, 1997
The effect of canopy shade on leaf lipid composition was examined in soybeans (Glycine max cv. Young) grown under field conditions. Expanding leaves were tagged at 50, 58 and 65 days after planting (DAP) in plots with either a high (10 plants m−1 row) or low (1 plant m−1 row) plant density.
Kent O. Burkey, Richard F. Wilson, Randy Wells   +2 more
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Sun and shade leaves: some field investigations

Journal of Biological Education, 1983
Some simple investigations can be carried out to demonstrate how light regime affects the final form of ...
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Seasonal changes in the physiology of shade leaves of Acer saccharum

Journal of Plant Physiology, 2000
Summary Changes in the physiology of shade leaves of sugar maple trees (Acer saccharum Marsh.) in eastern Massachusetts were monitored throughout several growing seasons. In the late spring, following leaf expansion, the sugar maple leaves showed high photosynthetic rates and a high carboxylation efficiency which increased only slightly into the ...
Martina Königer, Gary C. Harris, Elise Kibler   +2 more
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Chlorophyll fluorescence imaging of photosynthetic activity in sun and shade leaves of trees

Photosynthesis Research, 2007
The differences in pigment levels, photosynthetic activity and the chlorophyll fluorescence decrease ratio R (Fd) (as indicator of photosynthetic rates) of green sun and shade leaves of three broadleaf trees (Platanus acerifolia Willd., Populus alba L., Tilia cordata Mill.) were compared.
Hartmut Karl, Lichtenthaler, Fatbardha, Babani, Gabriele, Langsdorf   +2 more
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The Influence of Shading on Enzyme Activity in Seedling Leaves of Barley

Zeitschrift für Pflanzenphysiologie, 1976
Summary On shading the first seedling leaf of barley fresh weight was not affected but dry weight, total chlorophyll and soluble protein contents were significantly reduced. Shading also reduced the activity of seven representative leaf enzymes, namely, ribulose 1,5 diphosphate carboxylase (RuDPC), phosphoglyceryl kinase (PGK), glyceraldehyde-3 ...
openaire   +1 more source

Leaf Angle: An Adaptive Feature of Sun and Shade Leaves

Botanical Gazette, 1979
Ten woody deciduous dicot species, ranging from obligate sun plants to facultative sun/shade plants, were grown in full sun and approximately 17% of full sun. Observations of leaf orientation showed that the leaves of most species are slanted, some to nearly vertical, in full sun and are more nearly horizontal in the shade.
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The Effect of Shading on the Photosynthetic Rate and Longevity of Grass Leaves

Annals of Botany, 1972
The rate at which the net photosynthesis of grass leaves grown in bright light (119 W m~2) decreased as they aged was increased by severe shading (to 21 W m~2 or less). However, less severe shading (light intensities of 36 W m~2 or more) had no effect. The decrease in photosynthesis was unaffected by whether the whole plant was shaded or only the leaf ...
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Do grazers leave mottled leaves in the shade?

Trends in Ecology & Evolution, 1991
John A. Allen, Rebecca Knill
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A Study of the Lobing of Sun and Shade Leaves

Ecology, 1957
Charlotte M. Talbert, Arthur E. Holch
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Mutual shading and the photosynthetic capacity of exposed leaves of field grown soybeans

Photosynthesis Research, 1988
Light-saturated photosynthetic rates at air levels of carbon dioxide were measured about weekly in upper canopy leaves of two soybean cultivars grown at stand densities of 40 and 100 plants per square meter. Early in the season, when leaf area indices differed between stand densities, plants of both cultivars grown at high stand density had ...
openaire   +2 more sources